Louis leonard luce and leroy mattson



Feb. 1924.

L. L. LUCE ET AL INTERNAL COMBUSTION ENGINE Filed Oct. 1, 1921 2Sheets-Sheet 1 gvvue/nl'o'ta LJfazfison.

Feb. 5

Y L. L. LUCE ET A.

INTERNAL COMBUSTION ENGINE 2 sheets-sheet 2 Filed Oct -1 1921 .LLuoe dL/Vazlaan.

I I a Patented Feb. 5, 1924.

UNITED STATES PATENT OFFICE.

INTERNAL-COMBUSTION ENGINE.

Application filed October 1, 1921.

To all whom it may concern:

Be it known that we, LOUIS L. Loon and LEROY MATTSON, citizens of theUnited States, residing at Portland, in the county of Multnomah, Stateof Oregon, have invented a new and useful Internal-Combustion Engine, ofwhich the following is a specification.

This invention relates to an internal combustion engine and is designedmore especially as an improvement upon the structure shown in Patent No.1,390,572 issued to us on Sept. 13, 1921.

It is an object of this invention to reduce 16 the length of thepatented motor as well as the pistons operating'there'in and to providethe upper portion of each cylinder with an integral wall projectingbetween the firing and thecharging pistons so as to prevent them fromcontacting with each other during the operation of the engine.

A still further object is to materially reduce friction by keeping thepistons out of contact with each other.

With the foregoing and other objects in View which will appear as thedescription proceeds, the invention resides in the com ination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that, within the scope ofwhat is claimed,

changes in the precise embodiment of the invention shown can be madewithout delpartingl from the spirit of the invention.

In t e accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings Figure 1 is a vertical section through the en 'ne.

igure 2 is ure 1.

Figure 3 is a section on line 33, Figure 1. I

Referring to the figures by characters of'reference 1 designates'thecasing of the engine, the same being provided with bean ings 2 in whichis journaled a shaft An intermediate portion of the shaft is journaled,in a bearing 4 carried by a partition formed at the center of the casinit being understood, as will be apparent 'y' referring'to' Figure 2,that the casing 1 is made u of two substantially cylindrical portionsormed integral with a section on line 22, Fig- Serial No. 504,546.

each other as shown or suitably joined so as to provide the partition 5in which the bearing 4: is formed.

Extending upwardly from the casing are spaced cylinders 6 the diametersof which i do not, however, contact with the walls of the casing. Thoseportions of the cylinders projecting beyond thecasing 1 are providedwith a water jacket 8 and suitably mounted within each of the cylinders,preferably at i the outer end thereof, is a spark plug 9. j

The shaft 3 is provided with two pairs of cranks indicated at 10 and 11.On the crank 10 is mounted a pitman 12 which is pivotally connected, asat 13, to a charging piston 14 having an eccentrically arranged opening15 therein into which projects one of the extensions 7. This opening isnecessarily eccentrically disposed in order to receive the portion 7which thus serves to guide the piston during its reciprocation withinthe casing 1. By constructing the charging piston as described itbecomes necessary to .use but one pitman 12 for each charging piston.The space between the guide por- "tion 7 and the wall of the casing 1and within which the piston 14 works is closed at its outer end exceptfor a port 16 which opens into the cylinder 6 from which said guideportion 7 extends. the ports 16 of the two cylinders being disposed atopposite sides of the partition 5 as shown clearly in Figure 1. v

The crank 11 is engaged by a pitman 17 extending into and plvotallyattached to a firing piston 18 adapted to work within the guideextension 7 and within the cylinder 6. The head of this piston isprovided at its periphery with a recess 19 adapted to register with theport 16 during the completion of each stroke of the piston away from itsspark plug 9. This head is preferably curved inwardly and laterally awayfrom the recess portion 19 so that when said recess is registeringwith-the port 16 the head has moved past'and has exposed an exhaust port20 formed in the cylinder 6 diametrically opposite the port 16.

A fuel intake port 21 opens into each of the cylindrical portions of thecasing 11, each port being in communication with the widest portion ofthe space between the guide portion 7 and the wall of the casing 1 andbeing located where it will only be exposed or opened when the piston 14reaches the limit of its suction stroke. It will be noted that each.piston 14 has a crescent shaped recess or pocket 22 in its active face.

For the purpose of preventing leakage between the working parts suitablepacking rings 23 can be extended around the pistons 14, the innerends-of the guide portions 7, and the end portions of each of thepistons 18.

As a means for scavenging the engine there is provided between thecylinders 6 a pipe 24 having nozzles 25 extending therefrom fordirecting steam jets into the c'ylinder 6 directly above and close tothe ports 16. i

During the operation of'the engine each piston 14 moves downwardly so asto uncover its intake port 21 and the partial vacuum produced by thisaction will result in fuel rushing into the path of the piston sothat'on the return stroke of said piston it will compress the charge.The compressed fuel will be directed into one of the cylinders 6 as soonas recess 19 comes into register with the port 16 and as soon as thisfuel has been directed into cylinder 6 pis ton 18 will compress the fuelby moving towards the spark plug 9. Ignition of the charge will thentake place in the usual manner and the piston 18 will be driven awayfrom the closed'head of the cylinder so as to expose the exhaust port20. Just prior'to the opening of the port 16 the recess 19 will exposeone of the nozzles 25 so that a jet of steam under pressure will bedirected upward into the cylinder and toward the exhaust port, therebyscavenging the cylinder and'eliininating carbon. The steam can besupplied to the nozzles 25 from any source desired.

Importance is attached to the fact that the cylinders 6 areeccentrical'ly disposed relative to the cylindrical portions of thecasing 1 because it is thus possible to reduce the number of connectionsbetween the pistons and the crank shaft. Furthermore by utilizing theguide portions 7 the engine can be made shorter and more compact thanheretofore and as the pistons are thereby kept out of-contact with eachother the friction is materially reduced and the engine rendered moreetlicient in operation. 7

4 What is claimed is 1. In an internal combustion engine the combinationwith a casing having cylindrical portions, of spaced cylinders integralwith the casing and having guide portions constituting extensionsthereof and eccentri cally mounted within the cylindrical portions ofthe casing, charging pistons mounted for reciprocation between saidguide portions and the walls of the cylindrical portions of the casing,a firing piston mounted for reciprocation within each cylinder and itsextension a port fordirecting fuel from the path of each chargingcylinder into the path of each firing cylinder, a fuel supply portadapted to bdopenedand closed by each of the charging pistons, anexhaust port in each cylinder, said firing pistons con stituting meansfor opening and closing the exhaust and intake ports and those portsfeeding fuel into the cylinders.

2. In an internal combustion engine a casing having cylindricalportions, cylinders ex cal portion of the casing, a crank shaft, and

connections between thecrank shaft and the charging and firing pistonsfor operating each charging piston in a direction opposite to its firingpiston.

3. In an internal combustion engine the combination with a casing havingcylindrlcal portions, of cylinders, a guide extension upon each cylindereccentrically mounted within one of the cylindrical portions of thecasing, a firing piston mounted. forxreciprocation within each cylinderand its extension, a charging piston mounted for reciprocation betweeneach guide extension and the cylindrical portionof the casing in whichit is located, means for moving each firing piston and its chargingpiston inopposite directions respectively, each charging pistoncooperating with its casing for compressing fuel in the path thereof, aportpfor conducting fuel from the path of eachcharging piston to oneofthe cylinders, anexhaust port communicating with each cylinder, ascavenging port openinginto each cylinder, each firing pistonconstituting means for controlling the opening and closing of the portsin properly timed relation.

4. In an internal combustion engine a casing having a cylindricalportion, a charging piston mounted for reciprocation therein and havingan eccentric opening therethrough, a cylinder, a guide extensionvthereon projecting through the opening in the charging piston, a firingpiston mounted for reciprocation within the cylinder and its extension,

and a port for conducting fuel from the path of the charging piston tothe path of the firing piston.

5. In an internal combustion engine a cas' ing comprising cylindricalportions, a crank shaft, charging pistons mounted for reciprocationwithin the respective cylindrical portions and each having aneccentrically arranged opening therein, there being a recess within theactive face of each piston, pitman connections between the crank shaftand the charging pistons, each connection being located where thedistance is greatest between the periphery of the piston and the openingtherein.

6. In an internal combustion engine the combination with a casing havingcylindrical portions, of charging pistons mounted for reciprocationwithin said portions, a tubular guide arranged eccentrically within veach charging piston, a firing piston mounted 20 for reciprocationwithin each guide, cylinders constituting continuations of the guides.In testimony that we claim the foregoing as our own, we have heretoafiixed our signatures in the resence of two witnesses.

OUIS LEONARD LUCE. LEROY MATTSON. Witnesses:

N. M. PALMER, L. A. JONES.

